• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tubes / Valves

All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum
A
Another What to build ...
Replies
12
Views
368
Francois G
Francois G
P
Fisher 400 Oscillation
Replies
8
Views
275
20to20
2
T
100 year old amplifier.
Replies
79
Views
10K
Wavebourn
Wavebourn
daveinnz
Completed the PH-16 Preamp
Replies
1
Views
159
grataku
G
hooman
green preamp
Replies
14
Views
791
hooman
hooman
S
Elevated heaters - coupling from cathodes into heater supply?
Replies
16
Views
1K
rleejr
R
wrenchone
Feedback-Based 6N3P-E Preamp
Replies
3
Views
219
wrenchone
wrenchone
M
Heater current draw question.
Replies
17
Views
376
Sorento
Sorento
Jasonkilo
Transformer laminate rust removal?
Replies
45
Views
1K
NareshBrd
N
sajadho1988
SET amp wiggling in the low frequency response
Replies
35
Views
1K
sajadho1988
sajadho1988
lineup
6GM8/ECC86 Tube Headphone Amp Hybrid
Replies
11
Views
620
Merlinb
Merlinb
jhstewart9
half 6SN7 6N6G Feedback Pair Damping Factor with & without NFB
Replies
16
Views
961
jhstewart9
jhstewart9
audio king
Schulmerich 6-228J Carillon Amplifier
Replies
5
Views
1K
paronaram
P
knotscott
Single Channel Dyna/VTA 70 - Can I Remove A Driver Tube?
Replies
15
Views
723
knotscott
knotscott
J
Kegger/blueglow KT88 PS hum
Replies
24
Views
575
20to20
2
mbrennwa
Tube does not want to turn off -- why?
Replies
12
Views
404
mbrennwa
mbrennwa
R
6N6P WCF Help
Replies
11
Views
799
Merlinb
Merlinb
russc
How to identify output faulty valve?
Replies
5
Views
371
russc
russc
jamesfeline
K8011/K8010 PCB build thread
Replies
196
Views
28K
jamesfeline
jamesfeline
Kay Pirinha
4CX250B - any use for them?
Replies
39
Views
2K
opcom
opcom
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